Question

Efectuați calculele:
a) √50 : √5;
b) √15 : (-√3);
c) -√35 : (-√7);d) 4√21 : √7;
e) (-9√14) : √2;
f) (16√42) : (-8√7);

Answer 1

Răspuns:

• (A)  $\bf\sqrt{10}$
• (B)  $\bf-\sqrt{3}$
• (C)  $\bf\sqrt{5}$
• (D)  $\bf 4\sqrt{3}$
• (E)  $\bf -9\sqrt{7}$
• (F)  $\bf -2\sqrt{6}$

Explicație pas cu pas:

Salutare!

(A)

$\bf \sqrt{50} :\sqrt{5} =\sqrt{50:5}=\boxed{\bf\sqrt{10} }$

(B)

$\bf \sqrt{15} :(-\sqrt{3}) =- \sqrt{15} :\sqrt{3}= -\sqrt{15:3}=\boxed{\bf-\sqrt{3} }$

(C)

$\bf -\sqrt{35} :(-\sqrt{7}) =\sqrt{35} :\sqrt{7}= \sqrt{35:7}=\boxed{\bf\sqrt{5} }$

(D)

$\bf 4\sqrt{21} :\sqrt{7} = 4\sqrt{21:7}= \boxed{\bf 4\sqrt{3} }$

(E)

$\bf (-9\sqrt{14}) :\sqrt{2} = -9\sqrt{14}:\sqrt{2} =-9\sqrt{14:2}= \boxed{\bf -9\sqrt{7} }$

(F)

$\bf (16\sqrt{42}) :(-8\sqrt{7}) = -16\sqrt{42}:8\sqrt{7} = -16:8\sqrt{42:7} = \boxed{\bf -2\sqrt{6} }$

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